static inline ArrowErrorCode ArrowArrayStartAppending()

in src/nanoarrow/array_inline.h [120:163]

• 36 lines of code
• 13 McCabe index (conditional complexity)

static inline ArrowErrorCode ArrowArrayStartAppending(struct ArrowArray* array) {
  struct ArrowArrayPrivateData* private_data =
      (struct ArrowArrayPrivateData*)array->private_data;

  switch (private_data->storage_type) {
    case NANOARROW_TYPE_UNINITIALIZED:
      return EINVAL;
    case NANOARROW_TYPE_SPARSE_UNION:
    case NANOARROW_TYPE_DENSE_UNION:
      // Note that this value could be -1 if the type_ids string was invalid
      if (private_data->union_type_id_is_child_index != 1) {
        return EINVAL;
      } else {
        break;
      }
    default:
      break;
  }
  if (private_data->storage_type == NANOARROW_TYPE_UNINITIALIZED) {
    return EINVAL;
  }

  // Initialize any data offset buffer with a single zero
  for (int i = 0; i < 3; i++) {
    if (private_data->layout.buffer_type[i] == NANOARROW_BUFFER_TYPE_DATA_OFFSET &&
        private_data->layout.element_size_bits[i] == 64) {
      NANOARROW_RETURN_NOT_OK(ArrowBufferAppendInt64(ArrowArrayBuffer(array, i), 0));
    } else if (private_data->layout.buffer_type[i] == NANOARROW_BUFFER_TYPE_DATA_OFFSET &&
               private_data->layout.element_size_bits[i] == 32) {
      NANOARROW_RETURN_NOT_OK(ArrowBufferAppendInt32(ArrowArrayBuffer(array, i), 0));
    }
  }

  // Start building any child arrays or dictionaries
  for (int64_t i = 0; i < array->n_children; i++) {
    NANOARROW_RETURN_NOT_OK(ArrowArrayStartAppending(array->children[i]));
  }

  if (array->dictionary != NULL) {
    NANOARROW_RETURN_NOT_OK(ArrowArrayStartAppending(array->dictionary));
  }

  return NANOARROW_OK;
}